feat: apply fee discount for outgoing tx

migrations/1620954224627-add-fee-priority.js

@@ -0,0 +1,20 @@
+const { saveConfig, loadLatest } = require('../lib/new-settings-loader')
+
+exports.up = function (next) {
+  const newConfig = {
+    wallets_BTC_feeDiscount: 'Default'
+  }
+  return loadLatest()
+    .then(config => {
+      return saveConfig(newConfig)
+        .then(() => next())
+        .catch(err => {
+          console.log(err.message)
+          return next(err)
+        })
+    })
+}
+
+module.exports.down = function (next) {
+  next()
+}